Celebrities such as Katy Perry and Heidi Klum have all thanked Spanx and other form-fitting shapewear for their glamour on the red carpet. There is a reason why body-hugging shapewear is a $680 million dollar industry: It sculpts and tones your body with no effort.

But taking the easy way out might not be the best idea. Doctors warn that wearing this type of tight clothing may cause health problems in the long run.

One side effect of shapewear is meralgia (Muh-rall-gee-uh paris-thet-ick-uh) paresthetica, a condition that causes burning and tingling in the thighs. The sensation occurs when there is too much pressure on nerves that run through the groin. Neurologists say the condition occurs mostly in pregnant women or people who tend to gain weight quickly.

According to doctors at Virginia Commonwealth University, clothing that compresses can also cause gastrointestinal problems by putting too much pressure on the abdomen. This causes acid to be pushed from the stomach into the esophagus, a condition called gastroesophageal reflux disease. Tight clothing worn around the groin can also exacerbate the symptoms caused by irritable bowel syndrome.

Doctors also say women who wear Spanx tend to avoid using the restroom due to the effort it takes to shimmy into their shapewear. Failure to empty your bladder can lead to urinary tract infections. In addition, the sweating caused by tight clothing can lead to yeast infection or skin irritation.

Doctors instead suggest people adopt a healthy lifestyle so that you feel less of a need to wear this type of clothing.

But if you want to wear shapewear, doctors say to do so in moderation. In other words, wearing them for a hot date is probably OK. Wearing them for long periods of time, such as an entire work day, is probably a bad idea.